Key data on migrant presence and integration in Barcelona

Barcelona is the second largest city in Spain with 1 620 809 inhabitants (2017). It is part of the Metropolitan area of Barcelona (3 226 600 inhabitants) The Metropolitan Area of Barcelona approximately corresponds to a Functional Urban Area according to OECD definition. The OECD definition of functional urban areas uses population density to identify urban cores and travel-to-work flows to identify the hinterlands whose labour market is highly integrated with the cores. The Barcelona FUA is slightly more populous than the Metropolitan Area: 3 846 697 residents in 2014.  within the province of Barcelona (TL3) (5 533 459 inhabitants) and in the Autonomous Community of Catalonia (TL2) (7 496 276 inhabitants) Territorial Level 2 (TL2) consists of the OECD classification of regions within each member country. There are 335 regions classified at this level across 35 member countries. Territorial Level 3 (TL3) consists of the lower level of classification and is composed of 1 681 small regions. In most cases they correspond to administrative regions..